package d3_note;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
//1.元注解
@Target({ElementType.TYPE,ElementType.METHOD})//只能用在类和方法上
@Retention(RetentionPolicy.RUNTIME)//保留的阶段
public @interface t3 {
    String value();
    double aaa();
    String[] bbb();
}
